Modern people often extend it to the way of keeping in good health. Eating porridge is a fitness method aiming at the characteristics of the elderly. It has the characteristics of combination of medicine and food, economy and convenience, and is highly praised by the ancients. Chinese medicine believes that porridge is easy to digest and absorb, and can harmonize the stomach, strengthen the spleen, clear the lung and moisten the lower body. Cao Cishan, a health care practitioner in the Qing Dynasty, said: "When you are old, you can eat porridge to get rid of illness, be strong and enjoy a long life without seeking medical treatment." Ma Yinchu, a contemporary economist, is over 100 years old. They eat porridge every day.